If this check box is selected, RubyMine inserts tabs for indentation and reformatting.
RubyMine inserts tabs in the beginning of each line
until a symbol other than the tab is inserted. After that when you press the tab key,
RubyMine will enter spaces.

If this check box is cleared, only tabs are used. This means that a group of spaces that
fits the specified tab size is automatically replaced with a tab, which may result in
breaking fine alignment.

The Smart Tabs check box is available if the
Use Tab Character check box is selected.

Tab size

In this text box, specify the number of spaces included in a tab.

Indent

In this text box, specify the number of spaces (or tabs if the
Use Tab Character
check box is selected) to be inserted for each indent level.

Continuation indent

In this text box, specify the number of spaces (or tabs if the
Use Tab Character check box is selected) to be inserted between the elements
of an array, in expressions, method declarations and method calls.

Keep indents on empty lines

If this check box is cleared, then RubyMine will keep indents on the empty lines as if they contained some code.
If this check box is not selected, RubyMine will delete the tabulation characters.

Indent all chained calls in a group

The check box is available only when the Indent chained methods check box is selected.

Set from...

Click this link to reveal the list of languages to be used as the base for the current language code style.
So doing, only the settings that are applicable to the current language are taken. All the other settings
are not affected.

This link appears in the upper-right corner of the language-specific code style page, when
applicable.

Click Reset to discard changes and return to the initial set of code style settings.